Merge "Change the default parameter values in common.MakeTempFile()."

  # Get the signature from the input package.

  signature = package_bytes[signature_start:-6]

  sig_file = common.MakeTempFile(prefix='sig-', suffix='')

  sig_file = common.MakeTempFile(prefix='sig-')

  with open(sig_file, 'wb') as f:

    f.write(signature)

  digest_line = sig.strip().split('\n')[-1]

  digest_string = digest_line.split(':')[3]

  digest_file = common.MakeTempFile(prefix='digest-', suffix='')

  digest_file = common.MakeTempFile(prefix='digest-')

  with open(digest_file, 'wb') as f:

    f.write(digest_string.decode('hex'))

  # Verify the digest by outputing the decrypted result in ASN.1 structure.

  decrypted_file = common.MakeTempFile(prefix='decrypted-', suffix='')

  decrypted_file = common.MakeTempFile(prefix='decrypted-')

  cmd = ['openssl', 'rsautl', '-verify', '-certin', '-inkey', cert,

         '-in', digest_file, '-out', decrypted_file]

  p1 = common.Run(cmd, stdout=subprocess.PIPE)

  return args

def MakeTempFile(prefix=None, suffix=None):

def MakeTempFile(prefix='tmp', suffix=''):

  """Make a temp file and add it to the list of things to be deleted

  when Cleanup() is called.  Return the filename."""

  fd, fn = tempfile.mkstemp(prefix=prefix, suffix=suffix)